GLB (GLTF) export, how to include color/material information?
Let's assume you have your model like this. Click on your model to select it. Then open the Material Properties panel by clicking the sphere in the Properties Editor.

Click on the New button to add a new material.

You should see something like this. You can edit the properties of the new material. Click on the Base Color button and a color picker will come up. You can now pick a color.


Your model will now export with the color you picked, but to see the way the model looks with materials applied, make sure the 3D View is in Material Preview mode.

Also when you export, make sure the Geometry &gt; Materials option is on (it is by default).